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Properties of a Good Sealant for Joints

By: Haseeb Jamal / On: Mar 28, 2017 / Notes, Shallow, Material Properties
Sealant for Joints
 
 

Properties of a good sealant

  1. A good sealant must be able to be overpainted.

  2. It should be chemically inert, non-corrosive in nature and provide protection to the underlying surface from environmental and biological effects.

  3. A good joint sealant should be durable and long-lasting.

  4. It's co-efficient of volumetric expansion must be less so that it does not expand a lot when exposed to heat.

  5. A good sealant should have a very good adhesion to most construction materials.

  6. It should provide air tightness and sound insulation.

  7. Must be flexible, elastic and of softer grade and not stiff.

  8. Good wetting behavior

  9. Must be able to absorb thermal as well as vibrational stresses

 

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